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Maritrema heardi : ウィキペディア英語版 | Maritrema heardi
''Maritrema heardi'' is a parasitic fluke that infects the marsh rice rat (''Oryzomys palustris'') in a salt marsh at Cedar Key, Florida. It was first listed as ''Maritrema'' sp. II in 1988,〔Kinsella, 1988, table 1〕 then described as the only species of a new genus, ''Floridatrema heardi'', in 1994,〔 and eventually reassigned in 2003 to ''Maritrema'' as ''Maritrema heardi''.〔 Its intermediate host is the fiddler crab ''Uca pigilator''〔Kinsella, 1988, p. 277〕 and it lives in the intestine of the marsh rice rat, its definitive host.〔 Together with two other species of ''Maritrema'', it is very common in affected marsh rice rats;〔 it infects 19% of studied rats at Cedar Key.〔 According to Tkach and colleagues, ''M. heardi'' is probably primarily a parasite of birds that has secondarily infected the marsh rice rat.〔Tkach et al., 2003, p. 11〕 ''Floridatrema'' was distinguished from ''Maritrema'' on the basis of its possession of loops of the uterus that extend forward to the place where the intestine is forked or even to the pharynx. Genetically, ''M. heardi'' may be closest to the morphologically similar ''M. neomi'', which infects ''Neomys'' water shrews in the Carpathians.〔 ==References==
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